14:3] Hausschwaium, holzzerstöreiide Pilze. 271 



IX. Hausschwamm, holzzerstörende Pilze. 



1178. Abbott, r. H. The red rot of conifers. (Vermont Agric. 

 Kxper. Stat. Bull. Nr. 191. Ifllö. p. 3—20, 2 fig.. 3 tab.) — Behandelt aus- 

 führlich Trametes Pini. 



1180. Brown, H. l*. A timber rot accompanying Hymenochaete 

 rubiginosa (Sehr ad.) Lev. (Mycologia VII, 1915, p. 1—20, tab. 149—151.) — 

 Verf. gibt folgende Zusammenfassung: 1. Hymenochaete rubiginosa (Schrad.) 

 L^v. is a common saprophyte on decorticated chestnut about Ithaca: it is 

 found more rarely on oak. 2. The fruit bodies are annual and quite xero- 

 phytic; spores are shed intermittently during moist periods for several months. 

 3. Spore germination occiirs best in decoctions of oak or chestnvit sawdust 

 and tap water. Mycelial growth was restricted and clamp connections were 

 not observed. 4. The first evidence of decay in oak and chestnut consist in 

 the formatiou of white spots here and there in the wood. Cavities lined with 

 cellulose are formed through the partial or complete digestion of the Clements. 

 5. The tissues between the infected areas remain nearly or quite as sound 

 as in normal wood. Rarely do the pockets coalesce through the digestion 

 of interveniug tissue. 6. The chemical action of the fungus consists first in 

 the delignification of the elemeuts attacked. This begins with the tertiary 

 layer and continues outward. 7. Soon after the middle lamella is attacked 

 it is dissolved and the elemeuts separate or remaiu loosely attached at the 

 Corners. 8. Cellulose digestion continues after the Clements become isolated. 

 The tin-walied Clements including pith ray cells and wood parenchyma are 

 first dissolved. 9. The pockets arising in the wood are at first lined with 

 partially digested Clements which consist of pure cellulose. In the final stage 

 the white lining entirely disappears. 10. The decay accompanying the fungus 

 is comparable to that caused by Trametes abietis Karst., on red spruce and 

 other conifers. It has a remarkable resemblance in superficial appearance 

 and metliod of attack to that caused by Sterenm jrustulosum (Pers.) Fr. 

 11. A superficial, peripherial type of decay, in which all the Clements are 

 attacked but not entirely digested, usually accompauies the typical decay 

 caused by Hymenochaete rubiginosa. The walls remaining are dark in color 

 and fail to respond to the cellulose reaction. — Am Schluss wird eine Liste 

 der einschlägigen Literatur (20 Nummern) gegeben. Die Tafeln zeigen prächtige 

 photographische Abbildungen. 



1181. Chapman, R. X. Observations on the life histoty of 

 Agrilus bilineatus. (Journ. Agric. Research III, 1915, p. 283—293, 2 PI.) — 

 Verf. weist hin auf die Beziehungen, welche zwischen Agaricus melleus und 

 ^er genannten Käferart als Verursacher des Absterbens von Eichen bestehen. 



1182. Haack. Über den Hausschwamm. (Allg. Forst- u. Jagdztg. 

 XCI, 1915, p. 251 — 252.) — Das Baidiolz ist nach der Fällung an den Schnitt- 

 flächen und den frischen Aststummeln mit Karbolineum zu bestreichen imd 

 mit möglichst imbeschädigter Rinde aus dem Walde abzufahren. Es fehlt 

 noch immer an einem dauerhaften, billigen Mittel, das das Eindringen der 

 Sporen verhütet. Dies Mittel müsste auch geruchlos und feuerungefähr- 

 lich sein. 



1183. Havelik, Karl. Die Hausschwammplage an den Tele- 

 graphenstangen. (Centralbl. f. d. ges. Forstwesen 1914, Heft 7/8, p. 278 

 "bis 296.) 



